/* -------------------------------------------------------------------------
 *
 * placeholder.h
 *	  prototypes for optimizer/util/placeholder.c.
 *
 *
 * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * src/include/optimizer/placeholder.h
 *
 * -------------------------------------------------------------------------
 */
#ifndef PLACEHOLDER_H
#define PLACEHOLDER_H

#include "nodes/relation.h"

extern PlaceHolderVar* make_placeholder_expr(PlannerInfo* root, Expr* expr, Relids phrels);
extern PlaceHolderInfo* find_placeholder_info(PlannerInfo* root, PlaceHolderVar* phv, bool create_new_ph);
extern void find_placeholders_in_jointree(PlannerInfo* root);
extern void update_placeholder_eval_levels(PlannerInfo* root, SpecialJoinInfo* new_sjinfo);
extern void fix_placeholder_input_needed_levels(PlannerInfo* root);
extern void add_placeholders_to_base_rels(PlannerInfo* root);
extern void add_placeholders_to_joinrel(PlannerInfo* root, RelOptInfo* joinrel,
                                        RelOptInfo *outer_rel, RelOptInfo *inner_rel);

#endif /* PLACEHOLDER_H */
